First - if this is in the wrong forum, please feel free to move it; I wasn't quite sure where it belonged.
There was a mention of sensitometers in my densitometer thread I posted the other day, and I was doing some research online, because obtaining a sensitometer was my next step. Obviously accurately simulating daylight becomes problematic, as there are few, if any practical sources of spectrally accurate broadband illumination.
I found an interesting light source, datasheet found here: https://cdn.shopify.com/s/files/1/0344/6401/files/P3210004-2.1.pdf?v=1680229541 - it's from Yuji LED, who some of ya might recognize from the high CRI LEDs that they make. Most of their stuff is pretty neat, but so damned expensive that I've basically ignored them.
This is an LED with relatively even output from 400nm - 800nm; it's a little blue-heavy, but not so bad that it couldn't be corrected with some yellow filtration. Evidently it's blue / UV pump dies, and a series of broadband phosphors with emission out as far as 1000nm. It's a surface mount LED, but they sell it on a board for about $35 USD. It's not practical for illumination (It's rated at like 150 lumens or so), but for a test daylight simulator, or even a spectrophotometer, something like this would be absolutely outstanding.
Just thought it was an interesting thing to throw out there!
There was a mention of sensitometers in my densitometer thread I posted the other day, and I was doing some research online, because obtaining a sensitometer was my next step. Obviously accurately simulating daylight becomes problematic, as there are few, if any practical sources of spectrally accurate broadband illumination.
I found an interesting light source, datasheet found here: https://cdn.shopify.com/s/files/1/0344/6401/files/P3210004-2.1.pdf?v=1680229541 - it's from Yuji LED, who some of ya might recognize from the high CRI LEDs that they make. Most of their stuff is pretty neat, but so damned expensive that I've basically ignored them.
This is an LED with relatively even output from 400nm - 800nm; it's a little blue-heavy, but not so bad that it couldn't be corrected with some yellow filtration. Evidently it's blue / UV pump dies, and a series of broadband phosphors with emission out as far as 1000nm. It's a surface mount LED, but they sell it on a board for about $35 USD. It's not practical for illumination (It's rated at like 150 lumens or so), but for a test daylight simulator, or even a spectrophotometer, something like this would be absolutely outstanding.
Just thought it was an interesting thing to throw out there!